English

Give reason: Sodium, potassium and lithium are stored under oil. - Science

Advertisements
Advertisements

Question

Give reason:

Sodium, potassium and lithium are stored under oil.

Short/Brief Note
Advertisements

Solution

  1. All three metals react with water, producing a lot of heat. As a result, hydrogen evolves and catches fire.
  2. They cannot be kept in the air because air contains moisture or water vapours. They are kept under kerosene to avoid contact with both air and water.
shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Metals and Non-metals - Exercises [Page 57]

APPEARS IN

NCERT Science [English] Class 10
Chapter 3 Metals and Non-metals
Exercises | Q 12.2 | Page 57

RELATED QUESTIONS

Name two metals which will displace hydrogen from dilute acids, and two metals which will not.


What are amphoteric oxides?


Diamond : electric insulator : : _______ : electric conductor


Which of the following oxide(s) of iron would be obtained on the prolonged reaction of iron with steam?


Example of an amphoteric oxide is:


Which one of the following metals does not react with cold as well as hot water?


Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?


Stainless steel is very useful material for our life. In stainless steel, iron is mixed with


If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of


When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y and Z and also write the reaction involved.


Which of the following reacts with cold water vigorously?


The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is ______.


Material: Copper wire, Iron nail, Beaker or Big test tube.

Chemicals: Ferrous Sulphate and Copper Sulphate Solution.

  1. Which reaction you will study with the help of the above material and solutions? Draw the diagram of the experiment arrangement.
  2. How do you identify that the reaction is carried out?
  3. Which type of reaction did you observe?

Answer the questions based on the figure below:

  1. Which experiment setup is demonstrated in the figure?
  2. What do you conclude after the reactions? Name reaction.

Answer the questions based on the figure below:

  1. Which reaction is shown in the figure?
  2. Which gas is evolved in the reaction?
  3. Give an example of reactants that rapidly show this reaction. Give equations.
  4. Give an example of reactants that do not react rapidly.
  5. In what condition will reactants of (c) part react? Give equation.

Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are:

  1. MgO
  2. ZnO
  3. Al2O3 
  4. Cao

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×